CN109369988A - A kind of high-pressure oil-resistant is without asbestos packing sheet and preparation method thereof - Google Patents
A kind of high-pressure oil-resistant is without asbestos packing sheet and preparation method thereof Download PDFInfo
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- CN109369988A CN109369988A CN201811273568.5A CN201811273568A CN109369988A CN 109369988 A CN109369988 A CN 109369988A CN 201811273568 A CN201811273568 A CN 201811273568A CN 109369988 A CN109369988 A CN 109369988A
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- antioxidant
- resistant
- coumarone
- pressure oil
- packing sheet
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/10—Polyamides derived from aromatically bound amino and carboxyl groups of amino-carboxylic acids or of polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The present invention relates to sealing material fields, specially a kind of high-pressure oil-resistant is without asbestos packing sheet and preparation method thereof, including following component: nitrile rubber 30-50kg, nm-class active calcium carbonate 35-60kg, blanc fixe 35-60kg, magnesia 4-8kg, Fanglun slurry cake 25-35kg, mineral fibres 25-35kg, acrylic fibers chopped strand 5kg, zinc oxide 1.5kg, coumarone 0.75kg, antioxidant D FC-34 1.36kg, antioxidant BLE-C 1.36kg, antioxidant d 0.3kg, sulphur 0.9kg, diphenylguanidine CP 0.6kg, Vulcanization accelerator TMTD 0.15kg, the present invention work well.
Description
Technical field
The present invention relates to sealing material field, specially a kind of high-pressure oil-resistant is without asbestos packing sheet and preparation method thereof.
Background technique
In the sealing of sealing element, such as flange seal, engine cylinder cap sealing etc., since there are many excellent for asbestos
Performance, especially its temperature resistant range can be between -30~+510 DEG C, therefore asbestos board and asbestos pad are widely used in sealing
It is general.Although asbestos board and asbestos pad are very widely used, having been accepted as asbestos in the world is a kind of carcinogen, therefore asbestos
Material application is extremely limited.This century the seventies, many countries propose non-asbestos plan, and U.S.EPA EPA is more
Promulgate that government regulation is forbidden to use asbestos material and its product in nineteen ninety.Nowadays advanced country in the world pushes away non-asbestos material
Extensively to each application field, asbestos material is disabled comprehensively.
The parent company that my company is located at Ningbo has been devoted to research and development without asbestos packing sheet or pad, application No. is
A kind of no asbestos board disclosed in 201110201658.5 or without asbestos pad and preparation method thereof, the no asbestos board or without asbestos pad
It by weight percentage include: rubber 8~15%, fiber 5~10%, graphite-filled object 10~60%, high wear-resistant carbon black 5~
30%, auxiliary agent 2~5%.It is of the invention to be free of asbestos material without asbestos board and without asbestos pad, using specific component and specific
Content, not only solve the technical problem that material does not use asbestos, have also obtained the high temperature resistant better than asbestos material, and obtain
Higher sealing performance was obtained, realizes the perfection substitution to corresponding asbestos friction material, and greatly improve sealing performance, but should
Invention exactly overemphasizes sealing performance, has ignored other two important performances there are the significant deficiency of R&D direction, one is
Intensity；The second is oil resistance；By the long-term follow of my company development teams, it is found that the oil resistance of the invention is very poor, soaks
Expansion rate after oil reaches 15.3%, this means that getting well for sealing performance is built upon and cannot use in the occasion rich in oil,
Otherwise sealing performance can be also lost, therefore, my company always strives to solve the significant deficiency after transferring the possession of the patent, fortunately, pays
Good return has been obtained out.
Summary of the invention
The purpose of the present invention is to provide high-pressure oil-resistants without asbestos packing sheet and preparation method thereof, to solve above-mentioned background skill
The problem of being proposed in art.
To achieve the above object, the invention provides the following technical scheme:
A kind of high-pressure oil-resistant is without asbestos packing sheet, which is characterized in that including following component: nitrile rubber 30-50kg, nanometer
Activated Calcium carbonate 35-60kg, blanc fixe 35-60kg, magnesia 4-8kg, Fanglun slurry cake 25-35kg, mineral fibres 25-
35kg, acrylic fibers chopped strand 5kg, zinc oxide 1.5kg, coumarone 0.75kg, antioxidant D FC-34 1.36kg, antioxidant BLE-C
1.36kg, antioxidant d 0.3kg, sulphur 0.9kg, diphenylguanidine CP 0.6kg, Vulcanization accelerator TMTD 0.15kg.
Preferably, including following component: nitrile rubber 30kg, nm-class active calcium carbonate 35kg, blanc fixe 35kg, oxygen
Change magnesium 4kg, Fanglun slurry cake 25kg, mineral fibres 25kg, acrylic fibers chopped strand 5kg, zinc oxide 1.5kg, coumarone 0.75kg prevent
Old agent DFC-34 1.36kg, antioxidant BLE-C 1.36kg, antioxidant d 0.3kg, sulphur 0.9kg, diphenylguanidine CP 0.6kg,
Vulcanization accelerator TMTD 0.15kg.
Preferably, including following component: nitrile rubber 50kg, nm-class active calcium carbonate 60kg, blanc fixe 60kg, oxygen
Change magnesium 8kg, Fanglun slurry cake 35kg, mineral fibres 35kg, acrylic fibers chopped strand 5kg, zinc oxide 1.5kg, coumarone 0.75kg prevent
Old agent DFC-34 1.36kg, antioxidant BLE-C 1.36kg, antioxidant d 0.3kg, sulphur 0.9kg, diphenylguanidine CP 0.6kg,
Vulcanization accelerator TMTD 0.15kg.
Preferably, including following component: nitrile rubber 30kg, nm-class active calcium carbonate 40kg, blanc fixe 40kg, oxygen
Change magnesium 5kg, Fanglun slurry cake 30kg, mineral fibres 30kg, acrylic fibers chopped strand 5kg, zinc oxide 1.5kg, coumarone 0.75kg prevent
Old agent DFC-34 1.36kg, antioxidant BLE-C 1.36kg, antioxidant d 0.3kg, sulphur 0.9kg, diphenylguanidine CP0.6kg,
Vulcanization accelerator TMTD 0.15kg.
As another aspect of the present invention, a kind of preparation method of the high-pressure oil-resistant without asbestos packing sheet, which is characterized in that packet
Include following steps:
(1) spice: using and overturn blender, spice temperature≤60 DEG C, spice time >=3.5 hour, and curing time >=4 are small
When；
(2) at: using at machine, control 70~90 DEG C of big roll temperature, small roll temperature≤6 DEG C, size roller speed is
30 ms/min, at 4~6 tons of bracing cable pressure, advance and retreat roller speed is 10~20 ms/min；
The large and small roller of Cheng Zhangji is not only logical steam but also logical cooling water；
Antioxidant BLE-C is heated to 48-53 DEG C in advance in the step (1), is mixed after pouring into coumarone, after 30min
57 DEG C are heated to, pours into spice in overturning blender after mixing again together with other components.
Compared with prior art, it the beneficial effects of the present invention are: remaining the advantages of documents illustrate, equally obtains
Higher sealing performance realizes the perfection substitution to corresponding asbestos friction material, and greatly improves sealing performance, but these are excellent
Point is not the self-existent value of the present invention, it is most important that, the present invention solves documents and is difficult in the occasion rich in oil
The defect used so that the expansion rate after immersion oil be only 3.3% (accomplished the limit substantially, might have better data,
But it can accomplish under the premise of loss on ignition, the leakproofness of holding documents are substantially nondecreasing in this way, applicant thinks
Belong to great innovation, this is R&D team after the valuable invention more than 1 year).
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment one
Nitrile rubber 30kg, nm-class active calcium carbonate 35kg, blanc fixe 35kg, magnesia 4kg, Fanglun slurry cake
25kg, mineral fibres 25kg, acrylic fibers chopped strand 5kg, zinc oxide 1.5kg, coumarone 0.75kg, antioxidant D FC-34
1.36kg, antioxidant BLE-C 1.36kg, antioxidant d 0.3kg, sulphur 0.9kg, diphenylguanidine CP 0.6kg, promotor
TMTD0.15kg。
Embodiment two
Nitrile rubber 30kg, nm-class active calcium carbonate 40kg, blanc fixe 40kg, magnesia 5kg, Fanglun slurry cake
30kg, mineral fibres 30kg, acrylic fibers chopped strand 5kg, zinc oxide 1.5kg, coumarone 0.75kg, antioxidant D FC-34
1.36kg, antioxidant BLE-C 1.36kg, antioxidant d 0.3kg, sulphur 0.9kg, diphenylguanidine CP0.6kg, promotor
TMTD0.15kg。
Embodiment three
Nitrile rubber 50kg, nm-class active calcium carbonate 60kg, blanc fixe 60kg, magnesia 8kg, Fanglun slurry cake
35kg, mineral fibres 35kg, acrylic fibers chopped strand 5kg, zinc oxide 1.5kg, coumarone 0.75kg, antioxidant D FC-34
1.36kg, antioxidant BLE-C 1.36kg, antioxidant d 0.3kg, sulphur 0.9kg, diphenylguanidine CP 0.6kg, promotor
TMTD0.15kg。
Above embodiments one to the preparation method that embodiment three uses all is: including the following steps: (1) spice: using and turn over
Turn blender, spice temperature≤60 DEG C, spice time >=3.5 hour, curing time >=4 hour；(2) at: using at machine,
70~90 DEG C of big roll temperature, small roll temperature≤6 DEG C are controlled, size roller speed is 30 ms/min, at 4~6 tons of bracing cable pressure, into
Moving back roller speed is 10~20 ms/min；The large and small roller of Cheng Zhangji is not only logical steam but also logical cooling water；In the step (1)
Antioxidant BLE-C is heated to 48-53 DEG C in advance, is mixed after pouring into coumarone, 57 DEG C are heated to after 30min, after mixing again
Spice in overturning blender is poured into together with other components.
Table 1: the performance test of embodiment one to embodiment three
As can be seen from Table 1, embodiment two is most preferred embodiment.
Example IV
As a comparison, on the basis of example 2, antioxidant BLE-C is heated to 48-53 in advance in the step (1)
DEG C, it is mixed after pouring into coumarone, 57 DEG C is heated to after 30min, pour into overturning blender together with other components after mixing again
All raw materials (component) are directly poured into spice in overturning blender by this important step of middle spice.
Embodiment five
Documents are application No. is a kind of no asbestos board disclosed in 201110201658.5 or without asbestos pad and its preparation side
Method.
Embodiment six
Coumarone is removed, all raw materials (component) are directly poured into spice in overturning blender.
Table 2: the performance test of example IV to embodiment six
As can be seen from Table 2, after removing coumarone, be lost coumarone it is included play softening, reinforcement, thickening, point
The effects of dissipating, to improve the effect of the processing performance of rubber, it is most important that so that the resistance to tearing of product has obtained very
Big promotion, but at the same time, leakproofness, oil resistance are all substantially at floor level, to lose existing for the present invention
Value；Certainly, antioxidant BLE-C is heated to 48-53 DEG C in advance in the step (1), after pouring into coumarone by another angle
It mixes, is heated to 57 DEG C after 30min, pour into this important step of spice in overturning blender after mixing again together with other components
Suddenly the step of being great innovative point, increases this important work under the premise of the processing step relative to documents is constant
Skill step produces unexpected effect, that is, coumarone enables to the oil resistant function of antioxidant BLE-C to obtain several times
Amplification certainly belonged to the scope of protection of the present invention in technical solution disclosed by the invention；The maximum wound of the present invention
New point is exactly this processing step.
Certainly, for the present invention still without research in other formulas, can coumarone make the oil resistant function of antioxidant BLE-C
The amplification of several times is obtained, this is to leave following significant improvement direction for, has great research significance.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of high-pressure oil-resistant is without asbestos packing sheet, which is characterized in that including following component: nitrile rubber 30-50kg, nanometer are living
Property calcium carbonate 35-60kg, blanc fixe 35-60kg, magnesia 4-8kg, Fanglun slurry cake 25-35kg, mineral fibres 25-
35kg, acrylic fibers chopped strand 5kg, zinc oxide 1.5kg, coumarone 0.75kg, antioxidant D FC-34 1.36kg, antioxidant BLE-C
1.36kg, antioxidant d 0.3kg, sulphur 0.9kg, diphenylguanidine CP 0.6kg, Vulcanization accelerator TMTD 0.15kg.
2. a kind of high-pressure oil-resistant as described in claim 1 is without asbestos packing sheet, which is characterized in that including following component: butyronitrile
Rubber 30kg, nm-class active calcium carbonate 35kg, blanc fixe 35kg, magnesia 4kg, Fanglun slurry cake 25kg, mineral fibres
25kg, acrylic fibers chopped strand 5kg, zinc oxide 1.5kg, coumarone 0.75kg, antioxidant D FC-34 1.36kg, antioxidant BLE-C
1.36kg, antioxidant d 0.3kg, sulphur 0.9kg, diphenylguanidine CP 0.6kg, Vulcanization accelerator TMTD 0.15kg.
3. a kind of high-pressure oil-resistant as described in claim 1 is without asbestos packing sheet, which is characterized in that including following component: butyronitrile
Rubber 50kg, nm-class active calcium carbonate 60kg, blanc fixe 60kg, magnesia 8kg, Fanglun slurry cake 35kg, mineral fibres
35kg, acrylic fibers chopped strand 5kg, zinc oxide 1.5kg, coumarone 0.75kg, antioxidant D FC-34 1.36kg, antioxidant BLE-C
1.36kg, antioxidant d 0.3kg, sulphur 0.9kg, diphenylguanidine CP 0.6kg, Vulcanization accelerator TMTD 0.15kg.
4. a kind of high-pressure oil-resistant as described in claim 1 is without asbestos packing sheet, which is characterized in that including following component: butyronitrile
Rubber 30kg, nm-class active calcium carbonate 40kg, blanc fixe 40kg, magnesia 5kg, Fanglun slurry cake 30kg, mineral fibres
30kg, acrylic fibers chopped strand 5kg, zinc oxide 1.5kg, coumarone 0.75kg, antioxidant D FC-34 1.36kg, antioxidant BLE-C
1.36kg, antioxidant d 0.3kg, sulphur 0.9kg, diphenylguanidine CP0.6kg, Vulcanization accelerator TMTD 0.15kg.
5. a kind of preparation method of high-pressure oil-resistant without asbestos packing sheet, which comprises the steps of:
(1) spice: using overturning blender, spice temperature≤60 DEG C, spice time >=3.5 hour, curing time >=4 hour；
(2) at: using at machine, controlling 70~90 DEG C of big roll temperature, small roll temperature≤6 DEG C, size roller speed is 30 meters/
Point, at 4~6 tons of bracing cable pressure, advance and retreat roller speed is 10~20 ms/min；
The large and small roller of Cheng Zhangji is not only logical steam but also logical cooling water；
Antioxidant BLE-C is heated to 48-53 DEG C in advance in the step (1), mixes after pouring into coumarone, is heated after 30min
To 57 DEG C, spice in overturning blender is poured into after mixing again together with other components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811273568.5A CN109369988A (en) | 2018-10-30 | 2018-10-30 | A kind of high-pressure oil-resistant is without asbestos packing sheet and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811273568.5A CN109369988A (en) | 2018-10-30 | 2018-10-30 | A kind of high-pressure oil-resistant is without asbestos packing sheet and preparation method thereof |
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| CN109369988A true CN109369988A (en) | 2019-02-22 |
Family
ID=65390264
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| CN201811273568.5A Pending CN109369988A (en) | 2018-10-30 | 2018-10-30 | A kind of high-pressure oil-resistant is without asbestos packing sheet and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114591548A (en) * | 2021-12-30 | 2022-06-07 | 浙江国泰萧星密封材料股份有限公司 | Nuclear-grade oil-resistant asbestos-free fiber sealing material and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6063147A (en) * | 1983-09-16 | 1985-04-11 | 豊田合成株式会社 | Vibration-damping sheet |
| CN1141230A (en) * | 1995-07-25 | 1997-01-29 | 舟山市海山密封材料有限公司 | Non-asbestos expanding type sealing plate and method for making same |
| CN1263903A (en) * | 2000-02-16 | 2000-08-23 | 太仓市宝马密封材料有限公司 | Sealing elastomer material reinforced by non-asbestos fibres and technology for compressing it into plates |
| CN101003719A (en) * | 2006-11-14 | 2007-07-25 | 南京工业大学 | Mixed fiber enhanced rubber based sealing composite material, and preparing technique |
| CN107141532A (en) * | 2017-06-02 | 2017-09-08 | 江苏泰力机械科技有限公司 | Without asbestos seal gasket and preparation method thereof |
-
2018
- 2018-10-30 CN CN201811273568.5A patent/CN109369988A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6063147A (en) * | 1983-09-16 | 1985-04-11 | 豊田合成株式会社 | Vibration-damping sheet |
| CN1141230A (en) * | 1995-07-25 | 1997-01-29 | 舟山市海山密封材料有限公司 | Non-asbestos expanding type sealing plate and method for making same |
| CN1263903A (en) * | 2000-02-16 | 2000-08-23 | 太仓市宝马密封材料有限公司 | Sealing elastomer material reinforced by non-asbestos fibres and technology for compressing it into plates |
| CN101003719A (en) * | 2006-11-14 | 2007-07-25 | 南京工业大学 | Mixed fiber enhanced rubber based sealing composite material, and preparing technique |
| CN107141532A (en) * | 2017-06-02 | 2017-09-08 | 江苏泰力机械科技有限公司 | Without asbestos seal gasket and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114591548A (en) * | 2021-12-30 | 2022-06-07 | 浙江国泰萧星密封材料股份有限公司 | Nuclear-grade oil-resistant asbestos-free fiber sealing material and preparation method thereof |
| CN114591548B (en) * | 2021-12-30 | 2024-03-26 | 浙江国泰萧星密封材料股份有限公司 | Nuclear-grade oil-resistant asbestos-free fiber sealing material and preparation method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 223700 Guilin Road, Siyang Economic Development Zone, Suqian City, Jiangsu Province Applicant after: Jiangsu Saier Sealing Technology Co., Ltd Address before: 223700 Guilin Road, Siyang Economic Development Zone, Suqian City, Jiangsu Province Applicant before: JIANGSU SAIER SEALING TECHNOLOGIES Co.,Ltd. |
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| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190222 |
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| RJ01 | Rejection of invention patent application after publication |